It's her life and she has to live it herself. But if you are running the risk of getting in trouble yourself just for being in the same vehicle with her, then you have every right to put your foot down. And letting her know you want her to keep it entirely secret from your kids would not be out of line in any way either. You could even explain to her why you feel as strongly as you do.
Is she picking up your kids and driving when she's been smoking? There is absolutely no way that should be allowed. Pot doesn't exactly improve your reflexes or your judgment. And that would literally be child endangerment. If she's a passenger in your car, you could just refuse to let her in if she's high.
I used to have a lot of trouble with one of my in-laws. Walking out a time or two established the boundaries pretty effectively. When people know you will take action, they take you seriously, especially when they really don't like the results.
Anyway, it is really fantastic that you are doing so well with all this going on. Kudos to you! And don't worry, you'll have plenty of time to get used to your goal weight. I'm thinking of buying myself a good leather jacket or coat or some other major clothing expense as a reward when I've reached my goal. It will also make the cheap part of me (which is huge!) insist that I not put the weight back on so as not to waste all the money that went into the purchase. I have months to think about what to get... this will be fun. It will have to be something fitted, so there's no room for weight gain. Yes, I'm manipulating myself. Ain't it great!
5'2", 55 years, Primal since April. Pre-Primal weight loss, from 216.6 to 157.8
Primal low: 140.2 (Dec. 3) Goal weight: 135?
Main Primal goal: beating back my CFS enough to function more normally and start writing again
More and more, our life has been governed by specialists, who know too little of what lies outside their province to be able to know enough about what takes place within it.
- Lewis Mumford